Why does my crush act like he likes me but says he dosent?

Alrite so theres this lil boy named mark.(VERY sexy) and i hadnt really noticed him all year until january.so i c him and try 2 get his attention by sending him this really flirty email and then i say my friend sent that. after months of waitin he neva emailed bac. so sad nd kinda gav up. but then lil lucky things started happenin 2 me.lik on a friday i was walkn in da hall way and here he com tryn 2 trip me. i was so shocked dat he woud do that 2 ME!... I didnt do nothn. no flirtin not even a smile. jus walkn bac 2 class happy. very happy:-) so time passes and l8er dat nite i go sk8tn.(nd i gotta say i lokked fine) and i c mr. sexy there. so im sk8tn on glow sk8 and this young man iz bac behind me shoutn "GO GURL GO GURL!!!"(cuz i waz dancn) i jus giv him a hand and sk8ed off. wow. cant believe it. so all through da nite he wanna tap me and try n touch me. wat did i do? no flirting. yes i waz that surprised. so anyways after a lil while of playn bac and forth wit each other i go hom:-( and there r more days of flirting.lik in febuary i think hes gonna ask me to the valentines dance. but he dosent. we meet each otha at the dance and i waz once again lookn nice. im actn happy and dancn 2 find out dat mark sed he didnt lik me. shut down....wit a lil bit of cursn at the end of the dance. i knew he heard me. so i stomped out of the gym mad az hell! i get my things and jus az i walk out that door there mark iz. wit hiz fine azz. he pushed me. i waz 2 mad 2 figure out who it waz. and then...anotha tap. i turn around 2 find mark with hiz hand out lik he wanted a hug. so i hugged him. wit hiz HARD AZZ body. wow. anotha nice moment. rite there huggn on mark rite there in front of everybody. crazy stuff.so the nxt day everybody iz askn do u go out wit mark? do u go out wit mark?(bcuz the ppl at my skool think that) the ansawer wanted 2 b yes. but i had 2 tell da truth. no. so weeks of this **** went by. and then. nothn no flirtn wit mark. nun. no talk bout mark with me nothn. so i find out dat he givn out fone numbas and talkn 2 this fast lil gurl. crazy. but not good crazy. guess he gave up on me huh. wrong!!!!!!!!!! jus this week he stoppe=s by my locker and starts talkn. and im jus so confused after all of this stuff goin on rite now really? i dount kno wat he wants or wat he thinks bout me. iz crazy really tho. i kno the flirtin dosent sound real juicy lik u want it. but i dunno. im jus surprized dat he would he would try 2 get at me. everybody likes him. but not everybody gets him. ps. I AM NOT DESPRET If THAT iz WAT U WERE THINKING. CUZ IM HERE 2 TELL U IM NOT. thank u.:-)